dev_pm_domain_detach(9)

💅 dev_pm_domain_detach — the kernel API manual, bestie edition ✨

okay so you found dev_pm_domain_detach, the little function in the kernel API manual that's literally the "we're breaking up" text to a device's PM domain. sit down, grab a strawberry 🍓, and let's get into it.

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✨ NAME ✨

dev_pm_domain_detach — Detach a device from its PM domain. that's it, that's the whole vibe. 🦋

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🌸 SYNOPSIS 🌸

void dev_pm_domain_detach (struct device *dev , bool power_off );

returns nothing (void, she gives nothing and expects nothing back 💅), and it takes a device plus a bool. iconic signature tbh.

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🎀 ARGUMENTS 🎀

• dev — Device to detach. the main character of this whole operation 👑
• power_off — Used to indicate whether we should power off the device. yes bestie, it's a flag, and it does exactly what it says on the tin ✨

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🦋 DESCRIPTION 🦋

so this function will reverse the actions from dev_pm_domain_attach, dev_pm_domain_attach_by_id and dev_pm_domain_attach_by_name, thus it detaches dev from its PM domain. it's giving "undo button but make it power management" 😭

typically it should be invoked during the remove phase, either from subsystem level code or from drivers. so like, cleanup era. the farewell tour. 🌈

⚠️ ok real talk for a sec, bestie — callers must ensure proper synchronization of this function with power management callbacks. no cap, don't be sloppy about this one, fr fr.

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💜 SEE ALSO 💜

• Kernel file ./drivers/base/power/common.c
• dev_pm_get_subsys_data(9)
• dev_pm_put_subsys_data(9)
• dev_pm_domain_attach(9)
• dev_pm_domain_attach_by_id(9)
• dev_pm_domain_attach_by_name(9)
• dev_pm_domain_attach_list(9)
• devm_pm_domain_detach_list(9)
• devm_pm_domain_attach_list(9)
• dev_pm_domain_detach_list(9)
• dev_pm_domain_start(9)
• dev_pm_domain_set(9)
• dev_pm_domain_set_performance_state(9)

like, read the whole friend group, they all ate honestly 🫶

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and that's the page! 🧚 this one's from the ./drivers/base/power corner of the kernel, dated October 2026, living under the Kernel API Manual umbrella. stay synced, stay detached, mwah 💖🔥